Arc lamp



W. R. GRUBE R Aug. 15, 1933.

ARC LAMP Filed Feb. 6, 1951 3 Sheets-Sheet 1 IINVENTOR WZ'ZZz'amZZ. flaky: BY

flip ATTORNEY Aug. 15, 1933.

w. R. GRUBER;

ARC LAMP Filed Feb. *6,- 1931 3 Sheets-Sheet 2 INVENTOR Wz'ZZz'amJi. 6211561: BY 2 gnumnugynnm AITORNEY Au 15, 1933, GRUBER 1,922,036

ARC LAMP Filed Feb. 6, 1951 3 Sheets-Sheet 3 lNVENTOR William 13. 62255611 Rad/mm hi; ATTORNEY Patented Aug. 15, 1933 iM-T'EbiTSTA E .wumm'n. .Gi-uberQ neW rein-n.1, assignor to -Health Ray Mfg. Co. Inc., New York, N. -Y.,

ATE T OFFICE a qorporation of New York ,with which the light 'develops;

1.. ,ii'no'the'r object of the present invention is to l5 providela relatively small device of this kind which may. be readily still further reduced .in sizeforthepurpose of shipmentor other transportatiom inthat its support Qmay be secured within the body of the device when not in use.

. 20 .,,Another objectof invention is to socon- -sItruct thev deviceas to form a relatively" small casing. divided into distinct, physically separated resistance receiving" and electrode housing compartfiienta'thellattr provided with adjustable re- ,said' electrode compartment.

" The foregoing and still further objects of this invention will become more fully apparent from the following description and the accompanying drawings, forming part of my disclosure, and illustrating afew of the at present preferred constructions, but by .no means intended tolimit my invention to the actual showing, and in which, Q

Fig. 1 is a perspective view of a singlearc lamp of my construction supported by a stand,

Fig. 2 is a perspective view of my device in its collapsed form, V

Fig. .3 is a vertical cross-sectional view through my device shown in Fig. 1, V 4

Fig. 4 is a horizontal cross sectional view taken on line 44= of Fig. 3,' a

Fig. 5 is a perspective view of my double arc lamp.

Fig. 6 is a cross sectional view taken on line 6-6 of Fig. 5, and

Fig. 7 is a top view, partially in cross section,

of a quadruple arc lamp of my construction.

Referring to the illustration in Figs. 1, 2, 3 and 4, numeral 10 denotes a casing, preferably made of light material, as for instance aluminum, and

comprising a resistance receiving compartment 11 and an electrode housing compartment 12.

former is provided with air ventilation means,

indicated at 13,. which serves for effecting cool- Iflector means adapted to form wallsor sidesfor sheets 2 whichseparates them from the casing material. Each of the supports is provided with ti ve plate 23 at its top, whichis perforated at its center and held in place by screws 24, to one of which is attached one lead of the double electric iconduit25, entering through bottom 17" of the "2 2 of 'lowerele'ctrode support 19. The other lead which serves also as support for core 15.

The

v ap lic tio February-- 6, 1931. Serial No. 513,875

' 4'Claiins.:(Cl. 176- 103) '4 ing of aresistance element 14, mounted in this compartment, fpreferably upon a dielectric ,co ejls.

1. The electrode compartment 12 forms an extension of the resistance"compartment and divided therefrom by a partition '16 secured to bottom. 17 and'top 18'of the casing." Secured to bottom' 17 and itop 18are' dielectric electrode supports 19 and 20 resting against insulation a hollow channel 22 for acconn'nodatingwiring and binding posts. ,7 a

The lower electrode support 19 ha'sa conduccasingand lower insulation sheet 21 into channel of conduit 25 is attached to screw 26 mounted in offset extension27 of the electrode support. To

the same screw 26 is secured the lower end of resistanceelement 14 in the form of a clamp 28,

, The upper electrode support 20 is provided with an aperture 29 for receiving the upper electrode 30 and is equipped with a conductive plate 31 held in place by screw 32 and terminating in a spring extension 33' projecting into aperture 29 and adapted tobear against electrode 30 Plate 31 is perforated to accommodate the electrode which 'is manually adjustable in aperture 29. An electric conduit 34 is attached with one end to screw 32, while its otherend makes contact, by way of for core 15.

' In the lower electrode support 19 a manipulat ing device for the lower electrode 38 is illustrated and consists of a conductive rod 39 slidably mounted in aperture 40, provided in lower support '19, and extending through the perforated plate 23. Its upper end is equipped with an electrode 00 holding clip 41, while at its lower end a dielectric position after having been temporarily elevated for the aforesaid purpose.

Partition 16 dividing the two compartments serves as a stationary light reflecting surface for the are light produced between the electrodes. Hinged at the bottom and top plates of the casing and adjacent to partition 16 are side members 48, which, when'swung out as shown in Figs. 1 and 4, serve with their inner surfaces as side reflectors. When in inoperative position, as shown in Fig. 2, the side members form side closures or walls for the electrode compartment.

Electric conductor 25 is preferably equipped with a hand switch 44 (see Fig.1) for controlling the current to be admitted'to'the'device? At the portion of the casing forming the bot tom plate of the resistancemmpartmentis pro,- vided bushing 45 adapted to receive the upper end .ter serves as support for theupperstructure, of

my device, when in use, and may, be secured withof bushing 45 from; either without or within the casing.

In Figs. 5 and 6 isillustr'ate'da device similar to that explained above, with the exception that instead of asingleipair, two pairs of electrodes are arranged in the electrode compartment, which of course is somewhat largerin size. The lower electrodes and the lower ends 51 of resistances 52 are bridged, as seen at .53, while the upper ends 54 of .the resistances are separately connected with upper electrodes'55. The double electrode provision serves for intensifying the light effects, when a single pair of electrodes would be insufi'icient. When commencing to produce arc lights in the double electrode device it is necessary to first elevate one of the lower electrodes until an arc is produced between it and its corresponding upper mate, and then repeat the operation with the second electrode, so as to avoid excessive load in the line supplying current to the device.

The construction of the resistance element 52 is somewhat diflerent from that previously explained, since the resistance cores or supports are omitted. Also the end clamps'are eliminated, since this type of resistance is selfsupporting.

In Fig. 7 a somewhat modified form of my device is illustrated in which four pairs of electrodes are provided. Such construction is designed for enabling the illumination ofa larger area from all sides, if desired, or from one or more angles as the requirement may be. It consists of four distinct and individually useable electrode compartments 56, 57, 58 and 59, grouped about a central resistance compartment 60, in which a plurality of resistances (not shown) are individually coupled with the upper electrodes (not shown) and disposed above lower electrodes 61, shown in section. The structural arrangement of this modified form. is otherwise identical with the previously described figures, with the exception that the four dividing walls 62 are stationary.

My device is capable of still further modifications, and while I have described only those shown in the drawings, it is self-understood that changes and improvements may be incorporated,

side

and I therefore reserve for myself the right to make such changes and improvements without departing from the broad scope of my idea covered by the appended claims.

I claim:-

1. In an arc lamp including resistance and electrode compartments, having common tops and bottoms, upper andlower dielectric electrode supports extending from said resistance compartment into said electrode compartment, said upper support having an electrode holder adapted to fixedly retain an upper electrode in substantially vertical position, said lower electrode support provided'with a-fixed'electrode contact, a lower electrode holder operatively associated with said contact and adapted to engage and to hold the ,lower electrode in substantially vertical position 7 v and inalignment with an upper electrode, said of a combination handle and stand 46. "'I'h'elat- "lower electrode holder adapted to normally rest against said contactdue to. its own weightand the weight of the electrode, and capableof being temporarily elevated in order to bring the lower electrode into momentary contact with the upper electrode. I V H j Y 2. man are lamp, a pair of dielectric electrode supports, composed of upperand lower members, spaced from each other, and adapted to receive and retain electrodes in a substantially vertical alignment, the upper member havingmeans for adjustably holding an upper electrode fixed position, the lowermember provided with a restcontact and guide means for an electrode holder, a lower electrode holder operatively mounted in said guide means,,projecting throughand normally reposing upon said rest-contact, and adapted'to be temporarily elevated above said restcontact for the purpose of causing a momentary abutment beween the-electrodes of the two supports. r

3. In an arc lamp, the combination with a resistance and an electrode housing, of a pair of dielectric electrode supports,'forming upper and lower member separated from each other, the upper member provided with a resilient electrode holder adapted to adjustably retain the upper electrode in substantially vertical position, the lower member provided with guide means and a contact arrangement, a lower electrode holder operatively mounted in said guide means and comprising a stem, an electrode receiver at the upper end of the stem, and. a dielectric handle at its lower end, said electrode receiver adapted to normally rest upon said contact arrangement, due to the combined weight of the lower electrode holder and its'electrode, said stem adapted to always retain contact with said contact arrangement, said lower electrode holder capable of being temporarily elevated for the purpose of causing momentary contact between upperand lower electrodes.

4. In an are lamp, the combination with a combined resistance and electrode housing, of

it at the knob, forthe purpose of causing the electrodes to temporarily contact with each other, and to revert to its normal position when released, said stem permanently contacting with said plate while the holder is either at rest or while being operated.

WILLIAM R. GRUBER. 

